Home / 18,921.36-26,079.48-12,942.72

Finding the Fourth Proportional to 18,921.36, 26,079.48 and 12,942.72

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Solution

The fourth proportional to 18,921.36, 26,079.48 and 12,942.72 is: 17,839.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.36 : 26,079.48 = 12,942.72 : x
  2. Step 2: Convert to fraction form
    18,921.36/26,079.48 = 12,942.72/x
  3. Step 3: Cross multiply
    18,921.36x = 26,079.48 × 12,942.72
  4. Step 4: Simplify right side
    18,921.36x = 337,539,407.39
  5. Step 5: Solve for x
    x = 337,539,407.39/18,921.36
  6. Step 6: Final answer
    x = 17,839.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.